<div>
    <h1>hello.worldzaa</h1>
    <div style="width: 500px;text-align: center;">
        <img src="http://localhost:8080/bar/${code}.png">
        <span>${code}</span>
    </div>
    <img src="https://www.baidu.com/img/PCtm_d9c8750bed0b3c7d089fa7d55720d6cf.png">
</div>